The Windows download issue was reported on the ColorSync list. Maybe X-rite fixed this since?
Sorry, the UI bugs are in the new Target Editor, not Patch Viewer.
Load a target of a couple hundred patches. Some appear showing the color on the left hand side of the UI, many do not. You can load but not append more data, if you want to add a patch, it's one at a time. The UI on my Mac is filled with graphics that are not fully drawn (Red, Green, Blue). The asset area always defaults to closed and isn't stickly like the other modules. You must open them every time you visit the module. It takes forever to load patches. Click on a patch where no color appears on the left, press the Up or Down button, the color appears out of nowhere. You can delete a patch but you better want to, no undo. You can click on a column and it highlights some area, not others depending on which you pick, the action of the buttons has no effect either way so what's going on? Select patch 1, click on the Up button, that button grays out. Now pick another patch, still grayed out. I can go on and on, this is a beta of a release if that based on just this mess of a new module.